.main{
    width:100vw;
    height: 100vh;
    background: url(../images/pc-bg.jpg) center center no-repeat;
    background-size: cover;
    position: relative;
    z-index: 0;
}
.v{
    width: 600px;
    height: 400px;
    position: absolute;
    left: 50%;
    margin-left: -450px;
    bottom: -130px;
}
.u{
    width: 600px;
    height: 600px;
    position: absolute;
    left: 50%;
    margin-left: 40px;
    bottom: -320px;
}
.nzv,.nzu,.zero{
    font: normal bold 40px '黑体';
    color: #fff;
}
.nzv,.nzu{
    position: relative;
}

.line{
    width: 2px;
    height: 40px;
    background-color: #ccc;
}

.w1,.w2,.w3,ul{
    font: normal normal 25px '黑体';
    color: #fff;
}
.w1{
    position: absolute;
    left: 105px;
    top: 2px;
}
.w2{
    position: absolute;
    left: 200px;
    top: 8px;
}
.w3{
    position: absolute;
    left: 90px;
    top: 90px;
} 
.f1,.f2{
    font: normal normal 20px '黑体';
    color: #fff;
}
.f1{
    position: absolute;
    left: 105px;
    top: 30px;
}
.f2{
    position: absolute;
    left: 200px;
    top: 40px;
}
.zero{
    position: absolute;
    left: 65px;
    top:80px ;
}
li{
    display: inline-block;
}
ul{
    position: absolute;
    top: 80px;
}

[type="button"]{
    width: 200px;
    height: 60px;
    border-radius: 8px;
    font-size: 20px;
    background-color: #fff;
}

form{
    width: 800px;
    height: 50px;
    position: absolute;
    left:50%;
    margin-left: -400px;
    bottom: 50px;
    display: flex;
    justify-content: space-between;
}


.f a input:hover{
    background-color: rgb(90, 169, 235);
    color: #fff;
    font-size:22px ;
}